Design on CastrLabhttps://castrlab-blowfish-244231.gitlab.io/tags/design/Recent content in Design on CastrLabHugo -- gohugo.ioenluke@castrlab.com (Luke Paulson)luke@castrlab.com (Luke Paulson)© 2026 Luke PaulsonTue, 07 May 2024 00:00:00 +0000Framework Serial: Rebuilding Around an STM32https://castrlab-blowfish-244231.gitlab.io/posts/framework-serial-v2/Tue, 07 May 2024 00:00:00 +0000luke@castrlab.com (Luke Paulson)https://castrlab-blowfish-244231.gitlab.io/posts/framework-serial-v2/Second pass at the Framework bus tool, replacing the bridge IC with an STM32 to push the user interface into firmware and kill the host-software problem.Framework Serial: A USB-Serial Bridge with Programmable IO Levelshttps://castrlab-blowfish-244231.gitlab.io/posts/framework-serial-v1/Sat, 26 Mar 2022 00:00:00 +0000luke@castrlab.com (Luke Paulson)https://castrlab-blowfish-244231.gitlab.io/posts/framework-serial-v1/First attempt at the Framework bus tool — a clever power topology around a single bridge IC, undone by a software architecture I should have seen coming.